Subscriber Location Function
- Subscriber Location Function
The Subscriber Location Function, or SLF is an entity within an IP Multimedia Subsystem that provides information about the HSSwhat that is associated with a particular user profile. It is generally implemented using a database. If the home domain contains more than one HSS, I-CSCF and S-CSCF will communicate with SLF and find the appropriate HSS based on user profile. CSCF communicates with the SLF using diameter Dx interface and the application server communicates with the SLF using Dh interface.
pecifications
3GPP Specs
They can be downloaded from http://www.3gpp.org/specs/numbering.htm . The list below is a small selection.
* [http://www.3gpp.org/ftp/Specs/html-info/23228.htm TS 23.228] IMS stage 2
* [http://www.3gpp.org/ftp/Specs/html-info/24228.htm TS 24.228] Signalling flows for the IMS call control based on SIP and SDP; Stage 3
* [http://www.3gpp.org/ftp/Specs/html-info/29228.htm TS 29.228] IMS Cx and Dx interfaces : signalling flows and message contents
* [http://www.3gpp.org/ftp/Specs/html-info/29229.htm TS 29.229] IMS Cx and Dx interfaces based on the Diameter protocol; Protocol details
References
Wikimedia Foundation.
2010.
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